Application of the standard IEC 61373 for model-based vibration analysis to the equipment of Railway Bogie

Abstract

This thesis dealt with developing a Finite Element (FE) model of railway bogie and performing the vibration analysis of this model within a multi body system environment. The main objective of this work is to check for compliance of the vibration analysis results with an IEC (International Electrotechnical Commission) standard for the testing of equipment assembled to a railway bogie. Among various equipment such as mechanical, pneumatic, etc., attached to a railway bogie, the requirement in this study was to test the functional stability of brakes. A flexible FE bogie model was designed using ANSYS and a corresponding parametric ANSYS APDL code was developed, which could be used or future modifications in bogie design. The finite element bogie model was reduced to a substructured model in ANSYS, so that FE data along with the lexible bogie frame model were imported in SIMPACK for a multibody simulation. In SIMPACK, a rigid body rail environment including carbody, rail-wheel air, tracks, primary and secondary suspensions and joints were assembled with he imported flexible bogie frame model. Acceleration sensors were placed at ppropriate locations on the brakes inorder to measure the Acceleration Spectral ensity (ASD) for an input of track excitations through random vibrations along different simulation scenarios. The rms values from such results were checked or compliance with the standard and the influencing factors were identified. The otivation for this model-based vibration analysis was to apply such a model for estin of rail brakes, which could be economical and less time consuming compared to real time testing.